CN202580378U - Internal expanding type sealing connection device for pipeline pressure test - Google Patents
Internal expanding type sealing connection device for pipeline pressure test Download PDFInfo
- Publication number
- CN202580378U CN202580378U CN 201220213654 CN201220213654U CN202580378U CN 202580378 U CN202580378 U CN 202580378U CN 201220213654 CN201220213654 CN 201220213654 CN 201220213654 U CN201220213654 U CN 201220213654U CN 202580378 U CN202580378 U CN 202580378U
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- CN
- China
- Prior art keywords
- truncated cone
- pull rod
- cone assembly
- cone frustum
- frustum shaped
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
An internal expanding type sealing connection device for a pipeline pressure test is provided with a pull rod (1). A rod body of the pull rod (1) with a large limiting head (9) at one end is provided with a channel (10) through along the axial direction of the pull rod. A first cone frustum shaped assembly (3) and a second cone frustum shaped assembly (11) which are capable of moving along the axial direction of the pull rod are sleeved on the pull rod (1), and a distance is reserved between the opposite small ends of the two cone frustum shaped assemblies. A sealing ring (2) is arranged between the first cone frustum shaped assembly (3) and the large limiting head (9) of the pull rod (1), and a nut (7) which is located on the outer side of the large end of the second cone frustum shaped assembly (11) and is in threaded connection with the pull rod is mounted on the pull rod (1). A discontinuous circle body consisting of three or four circular arc shaped blocks (4) with same structures is wrapped on the conical faces of the first cone frustum shaped assembly (3) and the second cone frustum shaped assembly (11), and two sides of an inner arc face of each of circular arc shaped blocks (4) are provided with conical faces respectively corresponding to the conical faces of the first cone frustum shaped assembly (3) and the second cone frustum shaped assembly (11). The internal expanding type sealing connection device has the advantages of being easy to process, safe and reliable in use, convenient to dismount and the like, can be widely applied to hydrostatic tests of a single convection tube, an economizer and a superheater in the boiler device installing process and can be further correspondingly applied to other fields.
Description
Technical field
The utility model relates to and pipeline is carried out pressure test and is installed in the internal-expansion type seal connection of pipe end.
Background technique
Make in the installation process at industry equipment; Often need carry out independent intensity of pressure test and leak test to the conduit assembly that one or more interfaces (be mainly and be welded to connect) are arranged; To check its quality in manufacturing, transportation process; Cause because of the individual interfaces quality problems cause more greatly after avoiding integral installation to accomplish and do over again, even have a strong impact on construction speed and the whole installation quality of making.
For example; In middle low-pressure boiler is installed; The convection tube of water drum in the connection as if after welding, fail in time to carry out single water pressure test for strength because of centre row's convection tube, problems of welded quality occurs when treating the boiler bulk testing; Must the convection tube that it is good that welding is arranged in the outside be cut off more so, could reprocess defective in quality welding junction.Have, in mesohigh boiler erection process, need carry out pressure test separately to economizer, superheater tube assembly etc., it requires under the condition that the two ends of pipe assembly do not allow to weld and wire connection connects, to accomplish pressure test.Need design thus and a kind ofly have the elevated pressures of bearing and the easy-to-mount again seal connection of good seal performance, and this seal connection should be able to have into water, drainage exhaust function when pressure test.
Summary of the invention
The technical problem that the utility model will solve is; Deficiency to the existing technology existence; Design a kind of internal-expansion type seal connection that is used for pipeline pressure test, it can carry out the test pressure below the 20MPa during less than DN50 at the pressure testing pipe diameter, and has advantages such as easy processing, safe and reliable, easy accessibility; Single (group) convection tube, the economizer in the boiler equipment installation process, the hydrostatic test of superheater can be widely used in, also other field can be correspondingly be applied to.
The technological scheme of the utility model is, the said internal-expansion type seal connection that is used for the pipeline pressure test has pull bar, and an end has in the body of rod of said pull bar of spacing major part and is provided with along pull rod shaft to the passage that connects; Being set with on the pull bar can be along the axially movable first truncated cone assembly of pull bar and the second truncated cone assembly, and these two truncated cone assemblies than small end relatively and leave spacing; Between the spacing major part of the first truncated cone assembly and pull bar, be provided with seal ring, the nut that is positioned at the second truncated cone assembly bigger end outside and connects with this pull rod screw is housed on the pull bar; The discontinuous circle body of being made up of the circular arc-like block of three to four same structures is coated on the conical surface of the said first truncated cone assembly and the second truncated cone assembly, and the intrados both sides of each circular arc-like block respectively have conical surface to correspond respectively to the conical surface of the first truncated cone assembly and the conical surface of the second truncated cone assembly.
Referring to Fig. 1, the design principle and the working procedure of the utility model are at each port of pipe under test the utility model device (Fig. 1 installs the utility model schematic representation of apparatus at an end of treating duct 8) to be installed; During as installed, partly place in the pipe under test 8, nut 7 and pull bar 1 left end portion are stayed outside this pipeline by the device with nut 7 right-hand members shown in Figure 1; Motionless through fixing this pull bar of pull bar 1 left end, swivel nut 7 and when it is moved right on pull bar 1, just promote the first truncated cone assembly 3 to draw close to the second truncated cone assembly 11; Because the axial limiting effect of the 9 pairs first truncated cone assemblies 3 of spacing major part of pull bar 1, the just feasible discontinuous circle body of being made up of the circular arc-like block 4 of three to four same structures is spreading radially; Each circular arc-like block 4 with pipe under test is produced bigger expansionary force, and its with the pipe under test inwall between the bigger frictional force of generation, can offset tens of tons the pressure that forms when conduit assembly carries out pressure test; Utilize swivel nut 7 simultaneously and pull bar when tension; Form bigger pressure between the spacing major part 9 of pull bar 1 and the first truncated cone assembly 3; Make seal ring 2 produce bigger elastic dilatations and form tight the contact, obtain good sealing, the shutoff requirement when satisfying pressure test with inner-walls of duct.
Be provided with in the body of rod of said pull bar 1 along pull rod shaft and can realize in pipe under test water filling and make outwards drainage exhaust of pipe under test to the path 10 that connects.
Know by above; The utility model is a kind of internal-expansion type seal connection that is used for the pipeline pressure test; It can carry out the test pressure below the 20MPa during less than DN50 at the pressure testing pipe diameter; And have advantages such as easy processing, safe and reliable, easy accessibility, can be widely used in single (group) convection tube, the economizer in the boiler equipment installation process, the hydrostatic test of superheater, also can correspondingly be applied to other field.
Description of drawings
Fig. 1 is a kind of embodiment's of the utility model a structural representation.
In the drawings:
1-pull bar, 2-seal ring, 3-the first truncated cone assembly,
4-circular arc-like block, 5-elastic cuffs, 6-Steel Washer,
7-nut, 8-pipe under test, 9-spacing major part,
10-passage, 11-the second truncated cone assembly.
Embodiment
As shown in Figure 1, the internal-expansion type seal connection that the utility model is said to be used for the pipeline pressure test has pull bar 1, one end to have in the body of rod of said pull bar 1 of spacing major part 9 to be provided with along pull rod shaft to the path 10 that connects; Being set with on the pull bar 1 can be along the axially movable first truncated cone assembly 3 of pull bar and the second truncated cone assembly 11, and these two truncated cone assemblies than small end relatively and leave spacing; Between the spacing major part 9 of the first truncated cone assembly 3 and pull bar 1, be provided with seal ring 2, the nut 7 that is positioned at the second truncated cone assembly, the 11 bigger end outsides and connects with this pull rod screw is housed on the pull bar 1; The discontinuous circle body of being made up of the circular arc-like block 4 of three to four same structures is coated on the conical surface of the said first truncated cone assembly 3 and the second truncated cone assembly 11, and the intrados both sides of each circular arc-like block 4 respectively have conical surface to correspond respectively to the conical surface of the first truncated cone assembly 3 and the conical surface of the second truncated cone assembly 11.
Between the said nut 7 and the second truncated cone assembly 11, be provided with Steel Washer 6.
Said seal ring 2 is a rubber ring.
On the discontinuous circle body that said three to four circular arc-like blocks is formed radially having groove on the outer arced surface of each circular arc-like block 4 annular groove is arranged, elastic cuffs 5 is housed in the groove.The discontinuous circle body that this elastic cuffs 5 can make three to four circular arc-like blocks form is coated on the conical surface of the first truncated cone assembly 3 and the second truncated cone assembly 11 better.
Claims (4)
1. an internal-expansion type seal connection that is used for pipeline pressure test is characterized in that it has pull bar (1), and an end has in the body of rod of said pull bar (1) of spacing major part (9) and is provided with along pull rod shaft to the passage (10) that connects; Being set with on the pull bar (1) can be along the axially movable first truncated cone assembly (3) of pull bar and the second truncated cone assembly (11), and these two truncated cone assemblies than small end relatively and leave spacing; Between the spacing major part (9) of the first truncated cone assembly (3) and pull bar (1), be provided with seal ring (2), the nut (7) that is positioned at the second truncated cone assembly (11) the bigger end outside and connects with this pull rod screw is housed on the pull bar (1); The discontinuous circle body of being made up of the circular arc-like block (4) of three to four same structures is coated on the conical surface of the said first truncated cone assembly (3) and the second truncated cone assembly (11), and the intrados both sides of each circular arc-like block (4) respectively have conical surface to correspond respectively to the conical surface of the first truncated cone assembly (3) and the conical surface of the second truncated cone assembly (11).
2. according to the said internal-expansion type seal connection that is used for the pipeline pressure test of claim 1, it is characterized in that, between the said nut (7) and the second truncated cone assembly (11), be provided with Steel Washer (6).
3. according to the said internal-expansion type seal connection that is used for the pipeline pressure test of claim 1, it is characterized in that said seal ring (2) is a rubber ring.
4. according to the said internal-expansion type seal connection that is used for the pipeline pressure test of claim 1; It is characterized in that; On the discontinuous circle body that said three to four circular arc-like blocks is formed radially having groove on the outer arced surface of each circular arc-like block (4) annular groove is arranged, elastic cuffs (5) is housed in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220213654 CN202580378U (en) | 2012-05-14 | 2012-05-14 | Internal expanding type sealing connection device for pipeline pressure test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220213654 CN202580378U (en) | 2012-05-14 | 2012-05-14 | Internal expanding type sealing connection device for pipeline pressure test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202580378U true CN202580378U (en) | 2012-12-05 |
Family
ID=47249787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220213654 Expired - Lifetime CN202580378U (en) | 2012-05-14 | 2012-05-14 | Internal expanding type sealing connection device for pipeline pressure test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202580378U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433439A (en) * | 2013-08-26 | 2013-12-11 | 宁夏共享集团有限责任公司 | Pressure inspection tool for straight-opening cavity |
| CN103776594A (en) * | 2014-03-05 | 2014-05-07 | 湖南省工业设备安装有限公司 | Device and method for detecting welding quality of single boiler convective tube |
-
2012
- 2012-05-14 CN CN 201220213654 patent/CN202580378U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433439A (en) * | 2013-08-26 | 2013-12-11 | 宁夏共享集团有限责任公司 | Pressure inspection tool for straight-opening cavity |
| CN103433439B (en) * | 2013-08-26 | 2015-09-09 | 宁夏共享集团有限责任公司 | A kind of pressure check frock of straight shape of the mouth as one speaks chamber |
| CN103776594A (en) * | 2014-03-05 | 2014-05-07 | 湖南省工业设备安装有限公司 | Device and method for detecting welding quality of single boiler convective tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |
|
| CX01 | Expiry of patent term |